<html>

<head></head>

<body>
    <h2>Snackbar / Toast</h2>
    <p>在屏幕底部弹出消息,作用与使用方法都与Toast类似</p>
    <p>点击按钮显示提示信息，3 秒后消失</p>

    <button onclick="myFunction()">显示 Snackbar</button>

    <div id="snackbar" class="">一些文本..</div>
    <style>
        #snackbar {
            visibility: hidden;
            min-width: 250px;
            margin-left: -125px;
            background-color: #333;
            color: #fff;
            text-align: center;
            border-radius: 2px;
            padding: 16px;
            position: fixed;
            z-index: 1;
            left: 50%;
            bottom: 30px;
            font-size: 17px;
        }
        
        #snackbar.show {
            visibility: visible;
            -webkit-animation: fadein 0.5s, fadeout 0.5s 2.5s;
            animation: fadein 0.5s, fadeout 0.5s 2.5s;
        }
        
        @-webkit-keyframes fadein {
            from {bottom: 0; opacity: 0;} 
            to {bottom: 30px; opacity: 1;}
        }
        
        @keyframes fadein {
            from {bottom: 0; opacity: 0;}
            to {bottom: 30px; opacity: 1;}
        }
        
        @-webkit-keyframes fadeout {
            from {bottom: 30px; opacity: 1;} 
            to {bottom: 0; opacity: 0;}
        }
        
        @keyframes fadeout {
            from {bottom: 30px; opacity: 1;}
            to {bottom: 0; opacity: 0;}
        }
    </style>

    <script>
        function myFunction() {
            var x = document.getElementById("snackbar")
            x.className = "show";
            setTimeout(function(){ x.className = x.className.replace("show", ""); }, 3000);
        }
    </script>
</body>

</html>